Behavior common to both the user and game server APIs.

You can’t create this directly; instead use a SteamAPI or SteamGameServerAPI.

In Steamworks, a callback is a broadcast notification. In C++ you discover what notifications are available from the docs and use the STEAM_CALLBACK() macro to connect your method. In this Swift version you register using a run-time call to one of the registration methods such as onSteamServersConnected(_:). If you register after creating your API instance and before making your first call to runCallbacks() then your code is equivalent to the C++ version.

An instance of the Steamworks user API

Create and retain one of these to access and use the Steamworks APIs.

Steamworks ref: steam_api.h

An instance of the Steamworks game server API

Create and retain one of these to access and use the Steamworks game server APIs.

Steamworks ref: steam_gameserver.h

Wrap up the SteamEncryptedAppTicket functions.

See Encrypted Application Tickets